Internal-combustion engine.



'. No. 885,598. V PATENTBD APR. 21, 1908.

w. H. FROST.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED APR. 29. 1907.

4 7 if 17 Q 36 6 Z 18 r 1 l Ll- 4ZJ '5 MI? I 24 i ing ireferuhly located atn point uhove the nor- To all whom it may concern:

.cy lituler, said port hmng controlled by n .chamher an upwardly inclined duct or 0!!- take.

WARREN H. FROST, OF LOS ANGELES, CALIFORNIA.'

INTERNALCOMBUSTIOH ENGINE.

Specification of Letters Patent.

Patented *p1il 21, 1908.

Animation filed. April 28. 1807. Sirial No. 370,874.

Be it known that I, WARREN H. F3031, a eitizen of the United States, residing at Los Angeles in the county of Los Angeles and State of California, have invented new and useful Improvements in internal-Combustion Engines, of which the following is a. spemtiretion The main object of the present invention is to provide for regulation of the fuel sup ply in an economical'and ellicient manner.

A further obeet of the invention is to provide for onto or" the fuel supply during a variable portion of each stroke responsively to the lead on the en 'ine.

Another object of the inventionis to pro.- vide etheient means for the operation of the valves of the engine.

In the accompanying 1irawin rs:-Figure l is 2 side elevation 01 an eineoi intent of the invention. 1' 1g. 2 IS a vertical section on the 3 line I: Fig. l Fig. 3 is a side elevation of an engine with a'variahle throttle for the fuel controlling valve.

Referring to Fig. 1, the engine cylinder is designated at 1, the main shaftut 2, the frame at 3. The en ine is supplied with mixture through intone means comprising 8. tubular member 4 having an intakepassage 5 extending dmvmvardly thereinto and coinuuinicnting through a port with the engine mixture admission valve 7.

8 designates the exhaust valve and 9 the igniter (see Fig. 2). The fuel, for example, oii or other liquid fuel, is supplied by pipe 6 to afuelsupplvchamber10 in the upper portion of the tuhular member 4, and an overflow ipe ii is provided to maintain a defi nite evel therein. From, said fuel supply fire 12 leads to the intake mssugo :3 aforesaid, its outlet being et'introlled by a manual regulating means l3.

.A valve l 4, formed l'oremunple RS a rod slidingv'ti'ilcltlly21(1083litttlllt'i l2 and provided with a port or opening 15, serves to control communiruliou there-through, this valve bema fuel level, so that the valve controls the suction of fuel through said duetinto the iu- Said valve 14 is opernted by means hereinafter desrrihed, responsively to the load on the engine. The admission valve T is normullv closed by a spring 22 and is operi ated by a ever 17 connected by a link or rod l l shaft.

18 with an eccentric 19 on H. side shaft 20 on "one side of the engllupand :1 mm .21 on the said side shaft also rpm-ales the exhaust, valve 8 whit-h is uorumliy lu-l l r'losetl by a spring 39. Said side shrill is operated by the main shaft 2 of the engine by gearing, such as spiral gears 25;, .24, the SztllH being two to one gears for it four slroker (l(. The governor 25 is mounted at the Sltlt of the engine and operated hy geu!s-2ti, [I from said side Said governor trpti'ults u lever 28 engaging in a. yoke 2.) on a stepped "um 30 mounted to,slid i longitudinally on, but to rotate with, the nhl' ide shaft 20. Said fiteppeticnin has n plurality of-step portions 31 of dill'ert-nt. ('llH'iiVt leugth or extension and adapted toeuguge with u roller 3;- o'none end of a riid 3;; mum-vied to a lever 34 \vhirh operates the flill. i'outt'olling \zllit! 14, one or another of said step pnl'lhms opt-rutivnly eugugiug according to the longitudinal position of the step ram :15 determined by 1 IR position of the governor. These. steps of the cam are groov d so as to hold the rid/er from slipping oil of any step and lo mus-e the roller to travel definitely over one step or another.

.lNheu the engine is at low speed, the gov--' ernor .35 holds the tep rum to position of' least ell'e-etive .iiJ'Ul-lt uud at each suction stroke of the eng ne fuel is drawn it through duct 12 to the intake utul is mixer with the air ('ondng through passage 5, the. valve 7 being at the v\muv time opened by lever [7, rod 18 and et-i-i-ntrii' l!) upt'l'llfitl by shleshult 20. if the speed of the engine iiu-reuses, the 'governm 25 moves illr stepped rum over to bring it .wlrp or port i u of greater stroke into action and thus i (lose the slu-tiou inlet for fuel during u. suudl purl of the min-lie. ()9 further int-r use, lhe ui-ppt-tt (-uiu will he further moved t'dthring :1. tep portion of a yet, larger stroke into tu-tioii, ('ulblllg opening of the fuel Stu-lion throug'lr'u greater Sil'Ukt. The (um is operated hy the idilutl't an as to operate the valve. om'ewluriug ezu'h suction slIOkt'. ol' the engine, the time during which the valve is held open depending on the position of the mun, us ('ullll'nllml by the engine.

'lho ell'eet of the above. deserihed operation is to lengthen the time of fuel intake with inr-reuse of loud, and to sh rten the time of fuel intake with (let-reuse of loud. The uuixiuuun opening of the valve uni) also be varied, or it uurv remain the suuu-.,'oi ll v the time of opening he vuried, tie. .udiugto the conformation of the cum steps.

' fAn important feature of the invention is the revision for o )eration of all of the valves of tie engine in the manner shown, from a side shaft. whereby minimum economy and simplicity of construction and operation is attained.

In some cases the control of the fuel suc that may be by throttling as in the form shown in Fig. 3, wherein the governor 25 opcrates the valve 14 directly through a rod 36 and lever 37 to throttle the suction more. or less according to the load. In any case,

, however, [110- control is by varying the. ad-

mission of fuel rather than by varying the opening of the admission valve of the engine.

What I claim is 1. In an internal combustion engine, a cylinder therefor, a fuel inlet passage for the cylinder, an inlet valve bet-ween said passage and the cylinder, a fuel supplv chamber adjacent the inlet )assage and having an upwardly inclined tiuct extending into the inletpassage, amanually operated valve for controlling' the discharge month of said duct, a slide in the inlet )assagc and operating through a slot in said duct and having a port adapted to register with the channel of said duct, said slide restricting the passage of oil from said duct and being arranged longitu dinally cf the inlet passage whereby passage of air through the inlet passage is unrestricted irrespective of the position of the slide. and means operated by the engine for sliding said slide into positions according to the load on the engine.

2. In an internal combustion engine, a cylinder therefor, a fuel inlet passage for the cylinder, an inlet valve between said iassagc and the cylinder. a fuel supply chain )er adjacent the inlet passage and having a duct extending into the irlet passage, a manually operated valve for controlling the discharge mouth of said duct, a slide operating through a slot in said duct and having a poradapted to register with the channel of said duct, said slide restrictin the passage of oil from said duct and being arranged longitudinally of the inlet passage whereby passage of air through the inlet passage is'unrcstricted irrespective of th position of the slide, and

means operated by the en ine for sliding said slide into positions according to the load on the engine.

In an internal combustion en ine, :1 cylindcr therefor, 11 fuel inlet passage for the cylinder, an inlet valve between said )assage and the. cylinder, a fuel supply chem er surrounding said inlet nassage and having a duct extending into the inlet passage, means for maintaining a. substantially constant level of liquidfuel in the fuel chamber at a level below the discharge mouth of said duct, an adjustable valve opposite the discharge mouth of said duct, longitudinally of said inlet passage and a valve sliding in said duct across the passage of the duct and above the level of fuel in the fuel chamber, and means operated by the engine for sliding said slide into positions according to the load on the engine.

4. In an internal combustion engine, :1 cylinder therefor, a fuel inlet passage for the cylinder, an inlet valve between said )assage and the-cylinder. a fuclsupply cham her adjacent said inlet passage and having a duct extending into the inlet )assage, means for maintaining a substantially constant level of liquid fuel in the fuel chamber 'at a level below the discharge mouth of said duct, an adjustable valve opposite the discharge mouth of said duct, a valve sliding in .said duet across the passage of the duct and above the level of fuel in the iuel chamber, a pivoted lever connected to the slide, a side shaft 0 erated bv the. engine, a stepped cam on the side shaft, a rod connected to said lever and operated by the step ed cam, a governor geared with the side 5 iaft, and means operated by the governor for shiftin the stepped cam to impart regularly timed movements to the slide of different lengths accbrding to the load on the engine.

In testimony whereof, I have hereunto set my hand at LosAngelcs California this 13th day of April 1907.

\VARREN ILFROSI.

In presence of- An'rnun P. KNIGHT, FRANK L. A. GRAHAM. 

